Fix go mod tidy failure

Currently, the go mod tidy command is failing,
and thus, we cannot update the vendors correctly.
This is due to newer otel version has breaking
changes in its cross-module internal code.

This issue is reported in: open-telemetry/opentelemetry-go#4586

To fix it, we must specify a specific version of
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
So to fix:
go get go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.18.0
go mod tidy && go mod vendor

While doing this, I see the test TestAddLabelClient is unstable,
so I fix it along the way

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/glog v1.1.0
 	github.com/golang/snappy v0.0.4
+	github.com/google/go-cmp v0.6.0
 	github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/json-iterator/go v1.1.12
@@ -28,7 +29,7 @@ require (
 )
 
 require (
-	cloud.google.com/go/compute v1.19.1 // indirect
+	cloud.google.com/go/compute v1.21.0 // indirect
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
 	github.com/Azure/azure-sdk-for-go v65.0.0+incompatible // indirect
 	github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 // indirect
@@ -59,8 +60,8 @@ require (
 	github.com/docker/go-units v0.4.0 // indirect
 	github.com/edsrzf/mmap-go v1.1.0 // indirect
 	github.com/emicklei/go-restful v2.16.0+incompatible // indirect
-	github.com/envoyproxy/go-control-plane v0.11.1-0.20230524094728-9239064ad72f // indirect
-	github.com/envoyproxy/protoc-gen-validate v0.10.1 // indirect
+	github.com/envoyproxy/go-control-plane v0.11.1 // indirect
+	github.com/envoyproxy/protoc-gen-validate v1.0.2 // indirect
 	github.com/fatih/color v1.16.0 // indirect
 	github.com/felixge/httpsnoop v1.0.3 // indirect
 	github.com/fsnotify/fsnotify v1.5.4 // indirect
@@ -84,12 +85,12 @@ require (
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/gnostic v0.5.7-v3refs // indirect
-	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/google/s2a-go v0.1.4 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
-	github.com/googleapis/gax-go/v2 v2.7.1 // indirect
+	github.com/googleapis/gax-go/v2 v2.11.0 // indirect
 	github.com/gophercloud/gophercloud v0.25.0 // indirect
 	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/hashicorp/consul/api v1.13.0 // indirect
@@ -128,6 +129,7 @@ require (
 	github.com/prometheus/alertmanager v0.24.0 // indirect
 	github.com/prometheus/common/sigv4 v0.1.0 // indirect
 	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/rogpeppe/go-internal v1.10.0 // indirect
 	github.com/scaleway/scaleway-sdk-go v1.0.0-beta.9 // indirect
 	github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
@@ -136,22 +138,26 @@ require (
 	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.44.0 // indirect
 	go.opentelemetry.io/otel v1.18.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.18.0 // indirect
 	go.opentelemetry.io/otel/metric v1.18.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.18.0 // indirect
 	go.opentelemetry.io/otel/trace v1.18.0 // indirect
 	go.uber.org/goleak v1.1.12 // indirect
 	golang.org/x/crypto v0.25.0 // indirect
 	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/net v0.25.0 // indirect
-	golang.org/x/oauth2 v0.7.0 // indirect
+	golang.org/x/oauth2 v0.10.0 // indirect
 	golang.org/x/sync v0.7.0 // indirect
 	golang.org/x/sys v0.22.0 // indirect
 	golang.org/x/term v0.22.0 // indirect
 	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
-	google.golang.org/api v0.114.0 // indirect
+	google.golang.org/api v0.126.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
-	google.golang.org/grpc v1.56.3 // indirect
+	google.golang.org/genproto v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/grpc v1.58.0 // indirect
 	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/ini.v1 v1.66.4 // indirect

pkg/promclient/label_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"testing"
@@ -272,8 +273,8 @@ func TestAddLabelClient(t *testing.T) {
 						t.Fatalf("mismatch in len: \nexpected=%v\nactual=%v", test.labelNames, v)
 					}
 
-					for i, actualV := range v {
-						if actualV != test.labelNames[i] {
+					for _, actualV := range v {
+						if !slices.Contains(test.labelNames, actualV) {
 							t.Fatalf("mismatch in value: \nexpected=%v\nactual=%v", test.labelNames, v)
 						}
 					}